IE7 freezes when I try to access Windows Update on my WinXP SP2 laptop. Steps to repro:
I do not have any other firewall, anti-virus or anti-spyware programs installed or running.
You're off topic for this forum, which is dedicated to Windows Live OneCare. You may want to try the Windows newsgroups here: http://support.microsoft.com/newsgroups/Default.aspx